Finite element analysis method, device and equipment for abnormal sound of steering knuckle

Abstract

The invention relates to the technical field of vehicle design, and discloses a knuckle abnormal sound finite element analysis method, device and equipment, and the method comprises the steps: building a finite element model of a front suspension system, the finite element model comprises an initial knuckle model and a bearing flange model, and the initial knuckle model and the bearing flange model are pre-tightened together through a bolt model; applying a load corresponding to a preset working condition to the finite element model, and determining pressure change data on a contact surface between the initial steering knuckle model and the bearing flange model to represent whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model; and under the condition that the contact surface separation phenomenon is determined to occur through the pressure change data, a first reason for abnormal sound generated by the steering knuckle is determined. The method has the beneficial effects that the knocking abnormal sound generated between the steering knuckle and the bearing flange can be effectively identified, and the technical effects of accurately identifying the reason and the position of the abnormal sound in the front suspension system in the design stage and solving the problem of the abnormal sound are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle design, and in particular to a finite element analysis method, device and equipment for abnormal noise of a steering knuckle. Background Art

[0002] The front suspension system is an important component that connects the vehicle body and the front wheels. It is used to support the weight of the vehicle body and absorb the vibration caused by the road surface to the vehicle during driving to ensure the stability and maneuverability of the vehicle. When abnormal noise occurs in the front suspension system, it will greatly affect the user's driving experience, and will also have a certain impact on the performance and life of the front suspension system. Therefore, it is necessary to determine the cause and location of the abnormal noise in the front suspension system during the design stage and take corresponding measures. The front suspension system contains multiple parts, including steering knuckles and wheel hub bearings, so there are many reasons for the abnormal noise, and some methods need to be proposed to identify certain specific types of abnormal noise. Summary of the invention

[0003] The present application provides a finite element analysis method, device and equipment for abnormal noise in a steering knuckle, which can effectively identify the abnormal knocking noise occurring between the steering knuckle and the bearing flange, thereby achieving the technical effect of accurately identifying the cause and location of the abnormal noise in the front suspension system during the design stage and solving the abnormal noise problem.

[0004] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, an embodiment of the present application provides a finite element analysis method for abnormal noise of a steering knuckle, the method comprising:

[0006] Establishing a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model;

[0007] Applying a load corresponding to a preset working condition to the finite element model, and determining pressure change data on a contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to characterize whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model;

[0008] When it is determined through the pressure change data that the contact surface separation phenomenon occurs, a first cause of the abnormal noise generated by the steering knuckle is determined; wherein the first cause is used to guide the updating of the contact surface of the initial steering knuckle model.

[0009] The finite element analysis method for abnormal noise of the steering knuckle proposed in the embodiment of the present application simulates the preset working condition on the finite element model of the vehicle's front suspension system, obtains the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model under the preset working condition, and determines the cause and location of the abnormal noise of the steering knuckle based on the pressure change data, so as to update the initial steering knuckle model in a targeted manner, effectively eliminate the abnormal noise in the front suspension system, and improve the reliability of the designed front suspension system; at the same time, the method can also discover problems in advance in the design stage, effectively shorten the design cycle, and reduce design costs.

[0010] In a second aspect, an embodiment of the present application provides a finite element analysis device for abnormal noise of a steering knuckle, the device comprising:

[0011] A model building module, used to build a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model;

[0012] A first load simulation module is used to apply a load corresponding to a preset working condition to the finite element model to determine pressure change data on a contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to characterize whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model;

[0013] The first abnormal noise analysis module is used to determine the first cause of the abnormal noise generated by the steering knuckle when the contact surface separation phenomenon is determined to have occurred through the pressure change data; wherein the first cause is used to guide the updating of the contact surface of the initial steering knuckle model.

[0014] In a third aspect, an embodiment of the present application provides a computer device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the method described in any one of the above embodiments by executing the computer instructions.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute any one of the methods in the above embodiments.

[0016] In a fifth aspect, an embodiment of the present application provides a computer program product, including computer instructions, and the computer instructions are used to enable a computer to execute any one of the methods in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A step diagram of a finite element analysis method for abnormal noise of a steering knuckle provided in an embodiment of the present application;

[0019] Figure 2 A diagram showing the steps for determining the contact surface separation phenomenon in an embodiment of the present application;

[0020] Figure 3a It is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model after the screw is pre-tightened in the embodiment of the present application;

[0021] Figure 3b A pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under extreme steering conditions in an embodiment of the present application;

[0022] Figure 3c It is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the condition of single-side deep pit crossing in the embodiment of the present application;

[0023] Figure 3d It is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the washboard road braking condition in the embodiment of the present application;

[0024] Figure 3e It is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the condition of turning the steering wheel right in situ in the embodiment of the present application;

[0025] Figure 3f It is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the condition of turning the steering wheel left in situ in the embodiment of the present application;

[0026] Figure 4 This is a step diagram for processing the abnormal sound caused by the first reason in the embodiment of the present application;

[0027] Figure 5 It is a pressure distribution diagram of the contact surface between the slotted steering knuckle model and the bearing flange model under extreme steering conditions in an embodiment of the present application;

[0028] Figure 6 A diagram showing the steps for determining the second cause in an embodiment of the present application;

[0029] Figure 7It is a pressure distribution diagram of the assembly surface between the initial steering knuckle model and the bearing flange model after the load is applied in the embodiment of the present application;

[0030] Figure 8 This is a step diagram for processing the abnormal noise caused by the second reason in the embodiment of the present application;

[0031] Fig. 9 A diagram showing the steps of establishing a finite element model of a front suspension system in an embodiment of the present application;

[0032] Fig.10 A schematic diagram of a finite element model provided in an embodiment of the present application;

[0033] Fig.11 A module diagram of a finite element analysis device for abnormal noise of a steering knuckle provided in an embodiment of the present application;

[0034] Fig.12 A schematic diagram of the structure of a computer device provided in an embodiment of the present application.

[0035] Among them, the figure numbers of the drawings in the specification are as follows: 100. Model building module, 200. First load simulation module, 300. First abnormal noise analysis module, 401. Position where the pressure on the contact surface changes under extreme steering conditions, 402. Position where the pressure on the contact surface changes under one-sided deep pit conditions, 403. Position where the pressure on the contact surface changes under washboard road braking conditions, 404. Position where the pressure on the contact surface changes under the condition of turning the steering wheel right in place, 405. Position where the pressure on the contact surface changes under the condition of turning the steering wheel left in place, 406. Noise reduction groove, 407. Position where contact friction occurs after load is applied. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] Cars have become an indispensable means of transportation in today's society. As people drive more and more cars in their daily lives, they have higher requirements for car use experience and lifespan. The structure of a car mainly includes the body, chassis, power system, suspension system and tires. The suspension system includes the front suspension system and the rear suspension system. The front suspension system is an important component connecting the body and the front wheel. It is used to support the weight of the body and absorb the vibration caused by the road surface during driving to ensure the stability and maneuverability of the vehicle.

[0038] The front suspension system contains multiple parts, including suspension brackets, shock absorbers, steering knuckles and wheel hub bearings, etc. Different parts are connected by assembly to form the front suspension system. However, due to design reasons, different parts produce abnormal noises due to size and assembly reasons under various actual working conditions. When an abnormal noise occurs in the front suspension system, the abnormal noise will spread from the front suspension system to the vehicle body and to the driver's seat, greatly affecting the user's driving experience. At the same time, since the causes of abnormal noise include collision and extrusion between parts, these reasons will also have a certain impact on the performance and life of the front suspension system. Therefore, it is necessary to determine the cause and location of the abnormal noise in the front suspension system, and modify it according to the cause of the abnormal noise to eliminate potential sources of abnormal noise in advance. In actual situations, there are many reasons for abnormal noise, so it is necessary to propose some methods to identify certain specific types of abnormal noise.

[0039] Based on the above problems, the present application provides a finite element analysis method, device and equipment for abnormal noise of the steering knuckle, which is used to analyze the cause and location of the abnormal noise of the steering knuckle in the front suspension system during the design stage, wherein the method comprises: finite element modeling of the front suspension system as a whole and the connected tires; simulating the preset working conditions of the obtained finite element model to obtain the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; determining whether contact surface separation occurs based on the pressure change data, and if contact surface separation occurs, determining the cause and location of the abnormal noise of the steering knuckle for corresponding updates.

[0040] The method can effectively identify the abnormal knocking noise occurring between the steering knuckle and the bearing flange, achieving the technical effect of being able to accurately identify the cause and location of the abnormal noise in the front suspension system during the design phase, shortening the design cycle, and reducing the design cost.

[0041] The finite element analysis method for steering knuckle abnormal noise provided in this specification can be applied to the design process of the front suspension system of the vehicle, and correspondingly, it can also be applied to the design process of the rear suspension system of the vehicle. It can be understood that after adaptive modification, this method can also be used in the design process of other systems inside the vehicle to eliminate the abnormal noise caused by the separation of the contact surface between parts under actual working conditions.

[0042] According to an embodiment of the present application, an embodiment of a finite element analysis method for abnormal noise of a steering knuckle is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0043] In this embodiment, a finite element analysis method for abnormal noise of a steering knuckle is provided, which can be used in the above-mentioned vehicle design process. Figure 1 , Figure 1 The step diagram of the finite element analysis method for abnormal noise of the steering knuckle provided in the embodiment of the present application is shown in the figure, and the method includes:

[0044] S100. Establish a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together through a bolt model.

[0045] S200. Apply a load corresponding to a preset working condition to the finite element model to determine the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to characterize whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model.

[0046] S300. When it is determined through pressure change data that there is a contact surface separation phenomenon, determine the first cause of the abnormal noise generated by the steering knuckle; wherein the first cause is used to guide the update of the contact surface of the initial steering knuckle model.

[0047] Specifically, the initial knuckle model is a knuckle model designed according to actual needs during the design process, which matches the bearing flange model and is assembled with the bearing flange model through the bolt model. The bolt model is used to simulate the connection and fixation of the knuckle and the bearing flange by bolts in the real scene. Before the preset working condition simulation is performed, the initial knuckle model and the bearing flange model are pre-tightened by the bolt model so that the assembly relationship between the two conforms to the real scene. After pre-tightening, there is uniform pressure on the contact surface between the initial knuckle model and the bearing flange model, indicating that the two are assembled.

[0048] Furthermore, the finite element model is simulated by preset working conditions through finite element analysis software. The preset working conditions include: extreme steering, one-sided deep pit, washboard road braking, turning the steering wheel to the left and turning the steering wheel to the right, etc. The loads caused by various working conditions on the vehicle can be obtained by analyzing the load extraction report of the vehicle model, and can also be obtained by testing the whole vehicle on the actual road. The loads on the vehicle under various working conditions mainly include external forces and external torques. For example, under extreme steering and one-sided deep pit conditions, the load on the vehicle is the external force acting on the tire grounding point; under washboard road braking conditions, the load on the vehicle is the external force and external torque acting on the wheel center of the tire; under the working conditions of turning the steering wheel to the left and turning the steering wheel to the right, the load on the vehicle is the external torque acting on the wheel center of the tire. Correspondingly, the parts in the finite element model under various working conditions also have corresponding degrees of freedom conditions, that is, whether relative motion occurs between the parts, which needs to be determined according to the actual working conditions.

[0049] Furthermore, the load of the preset working condition is applied to the finite element model, and the finite element model performs corresponding movement to simulate the preset working condition after being subjected to the load condition. At this time, due to the movement of the parts, the pressure on the contact surface between the initial steering knuckle model and the bearing flange model changes, and the pressure change on the contact surface under the preset working condition is collected to obtain pressure change data. The larger the pressure change data, the greater the degree of separation between the contact surfaces of the initial steering knuckle model and the bearing flange model. The pressure change data can indicate the degree of separation between the contact surfaces of the initial steering knuckle model and the bearing flange model under the preset working condition.

[0050] It is understandable that after the preset working condition ends, the pressure on the contact surface between the initial steering knuckle model and the bearing flange model returns to the state before the preset working condition. Therefore, if it is determined that the contact surface separation phenomenon occurs during the preset working condition simulation process, the contact surface returns to the contact state from the separation state after the preset working condition ends, and because the speed of restoring contact is relatively fast, it is actually reflected as knocking between the steering knuckle and the bearing flange, resulting in abnormal noise, thereby determining the first cause of the abnormal noise of the steering knuckle. Further, after determining the first cause, the redesign of the initial steering knuckle model is guided according to the first cause, mainly by updating the contact surface of the initial steering knuckle model to reduce or eliminate the abnormal noise. Accordingly, the bearing flange model can also be redesigned according to actual needs.

[0051] The finite element analysis method for abnormal noise of the steering knuckle provided in the present embodiment simulates the preset working condition on the finite element model of the vehicle's front suspension system, obtains the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model under the preset working condition, and determines the cause and location of the abnormal noise of the steering knuckle based on the pressure change data, so as to update the initial steering knuckle model in a targeted manner, effectively eliminate the abnormal noise in the front suspension system, and improve the reliability of the designed front suspension system; at the same time, the method can also discover problems in advance in the design stage, effectively shorten the development cycle, and reduce development costs.

[0052] Reference Figure 2 , Figure 2 This is a step diagram for determining the contact surface separation phenomenon in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, whether the contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model is determined in the following manner:

[0053] S210. Using the pressure on the contact surface after pre-tightening as a reference, detect the pressure change on the contact surface after the load is applied to obtain pressure change data.

[0054] S220. If the pressure change data exceeds a set threshold, it is determined that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model.

[0055] Specifically, after the initial steering knuckle model and the bearing flange model are pre-tightened by the bolt model, the finite element model is in the initial state without load, and the state at this time is used as the reference state to compare with the state of the finite element model after the load is applied, so as to obtain the simulation results of the front suspension system under the preset working conditions, including the pressure change on the contact surface between the initial steering knuckle model and the bearing flange model. It can be understood that the threshold is set to be the same as the pressure value used as the reference, that is, when the pressure on the contact surface between the initial steering knuckle model and the bearing flange model drops to 0, the contact surface separation phenomenon occurs.

[0056] For example, refer to Figure 3a , Figure 3a : is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model after the screw is pre-tightened in the embodiment of the present application. When the initial steering knuckle model and the bearing flange model are pre-tightened by the bolt model, the pressure on the contact surface gradually increases from zero until the pre-tightening is completed. Figure 3a As shown, there is a uniformly distributed pressure on the contact surface, and the pressure at this time is used as a reference to determine the pressure change data under various working conditions.

[0057] Further, refer to Figure 3b , Figure 3b This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the extreme steering condition in the embodiment of the present application. As shown in the figure, after applying the load corresponding to the extreme steering condition, the pressure distribution on the contact surface changes, and the contact pressure decreases at 401. The difference between the value at 401 when the pressure is reduced to the minimum and the reference pressure is taken as the pressure change data. Figure 3b Under the working condition shown, the pressure at 401 is reduced to the minimum and takes a value of 0, that is, the value of the pressure change data is the same as the reference pressure, indicating that at this time, a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model.

[0058] Further, refer to Figures 3c to 3f , Figure 3c is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the condition of single-side deep pit crossing in the embodiment of the present application, Figure 3d is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the washboard road braking condition in the embodiment of the present application, Figure 3e is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the condition of turning the steering wheel right in situ in the embodiment of the present application, Figure 3f: This is a pressure distribution diagram of the contact surface between the initial steering knuckle model and the bearing flange model under the working condition of turning the steering wheel in situ left in the embodiment of the present application. As shown in the figure, when simulating various preset working conditions, pressure changes appear on the contact surface between the initial steering knuckle model and the bearing flange model, indicating that there is a certain degree of separation between the two. Figure 3c , Figure 3e and Figure 3f It can be seen from the figure that under the conditions of single-side deep pit crossing, right-turn steering wheel turning in situ, and left-turn steering wheel turning in situ, contact surface separation occurred between the initial steering knuckle model and the bearing flange model, and the locations where separation occurred were respectively Figure 3c 402 of Figure 3e 404 and Figure 3f 405 of. Figure 3d Under the washboard road braking condition shown in the figure, although pressure changes occur on the contact surface between the initial steering knuckle model and the bearing flange model, that is, Figure 3d 403, but the pressure change data here does not exceed the set threshold, which shows that no contact surface separation occurs at this time.

[0059] As an embodiment of the present application, when it is determined through pressure change data that a contact surface separation phenomenon occurs, determining the first cause of the abnormal noise generated by the steering knuckle includes:

[0060] S310. If it is determined that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model, it is determined that the first cause is that the contact surface separation phenomenon causes abnormal knocking noise, and the source of the abnormal noise is located on the contact surface of the initial steering knuckle model.

[0061] Specifically, after the preset working condition ends, the pressure on the contact surface between the initial steering knuckle model and the bearing flange model returns to the reference state before the preset working condition. Therefore, in the case of determining that the contact surface separation phenomenon occurs, the pressure on the contact surface returns to the reference pressure after the preset working condition simulation ends, that is, the contact surface returns to the contact state from the separation state, and the duration of the preset working condition is short, and the repeated changes in the pressure on the contact surface are reflected as knocking between the steering knuckle and the bearing flange, resulting in abnormal knocking noise, so the first reason is determined to be the abnormal noise caused by the knocking between the initial steering knuckle model and the bearing flange model caused by the contact surface separation phenomenon.

[0062] Furthermore, the location of the abnormal noise source is determined according to the location where the contact surface separation phenomenon occurs. It can be understood that when the knocking abnormal noise occurs, the location of the abnormal noise source is on the contact surface of the initial steering knuckle model, and the specific location needs to be analyzed through pressure change data. Figure 3b , Figure 3c , Figure 3e and Figure 3fIt can be seen that under the working conditions corresponding to the above figure, the locations of the abnormal noise sources are 401, 402, 404 and 405 respectively. Therefore, the location of the abnormal noise source is at the location where the contact surface separation phenomenon occurs on the contact surface of the initial steering knuckle model, thereby determining the cause of the abnormal noise and the location of the abnormal noise source.

[0063] Reference Figure 4 , Figure 4 This is a step diagram for processing the abnormal sound caused by the first reason in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, the method also includes:

[0064] S320. According to the pressure change data, the pressure anomaly width at the specific location where the contact surface separation phenomenon occurs is obtained.

[0065] S330. A noise reduction groove 406 is set on the contact surface of the initial steering knuckle model to obtain a slotted steering knuckle model; wherein the width of the noise reduction groove 406 is the same as the pressure anomaly width.

[0066] Specifically, refer to Figures 3a to 3f The contact surface where the pressure change occurs as shown in the figure is the surface in contact with the bearing flange model on the initial steering knuckle model. It can be understood that the pressure abnormality width is the width of the specific location where the contact surface separation phenomenon occurs along the tangential direction of the steering knuckle hole on the initial steering knuckle model. Figure 3b The first width can be obtained by Figure 3c The second width can be obtained by Figure 3e The third width can be obtained by Figure 3f The fourth width can be obtained. It can be seen that the first width, the second width and the third width are widths in the same direction, which is recorded as the first direction; the direction of the fourth width is perpendicular to the first width, the second width and the third width, which is recorded as the second direction.

[0067] Further, a noise reduction groove 406 is set on the initial steering knuckle model according to the pressure abnormal width. It can be understood that the noise reduction groove 406 is a through groove in the radial direction of the steering knuckle hole, and the width of the noise reduction groove 406 is the same as the pressure abnormal width. In the same direction, the maximum pressure abnormal width is used as the width of the noise reduction groove 406. In this embodiment, the first width is used as the width of the noise reduction groove 406 in the first direction, and the fourth width is used as the width of the noise reduction groove 406 in the second direction; according to the set width, the noise reduction groove 406 is set on the contact surface of the initial steering knuckle model, thereby obtaining a slotted steering knuckle model. It can be understood that the depth of the noise reduction groove 406 is not specifically limited and can be determined according to actual conditions. For example, the depth of the noise reduction groove 406 can be 0.3 mm.

[0068] For example, refer to Figure 5 , Figure 5This is a pressure distribution diagram of the contact surface between the slotted steering knuckle model and the bearing flange model under extreme steering conditions in the embodiment of the present application. It should be noted that the slotted steering knuckle model and the bearing flange model are pre-tightened by the bolt model, and the contact surface between the two only includes the bolt installation hole and its surrounding parts. The slotted steering knuckle model and the bearing flange model do not contact at the location where the noise reduction groove 406 is located. Figure 5 As shown, under extreme steering conditions, the slotted steering knuckle model and the bearing flange model perform the same movement, and the noise reduction groove 406 avoids the contact surface separation phenomenon, thereby avoiding the problem of abnormal knocking noise.

[0069] Reference Figure 6 , Figure 6 This is a step diagram for determining the second cause in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, the method further includes:

[0070] S410. Apply a load corresponding to a preset working condition to the finite element model, and determine the deformation of the initial steering knuckle model and the bearing flange model respectively; wherein the deformation is used to characterize whether contact friction occurs between the initial steering knuckle model and the bearing flange model.

[0071] S420. When it is determined through the deformation that contact friction occurs, determine the second reason why the steering knuckle produces abnormal noise; wherein the second reason is used to guide the update of the dimensions of the initial steering knuckle model and the bearing flange model.

[0072] Specifically, there is a certain gap between the initial steering knuckle model and the bearing flange model after pre-tightening, and the size of the gap can be determined by the design dimensional tolerance of the two. During the preset working condition simulation process, the initial steering knuckle model and the bearing flange model will deform under the influence of the load. If the sum of the deformation of the two exceeds the tolerance dimensional gap, the initial steering knuckle model and the bearing flange model will contact and generate friction, resulting in abnormal noise.

[0073] For example, the diameter of the knuckle hole in the initial knuckle model is 94mm, the tolerance range is 94mm at the lower limit and 94.05mm at the upper limit, and the diameter of the outer flange in the bearing flange model is 94mm, the tolerance range is 93.94mm at the lower limit and 93.91mm at the upper limit, so the tolerance size gap between the two ranges from 0.06mm to 0.14mm. Figure 7 , Figure 7This is a pressure distribution diagram of the assembly surface between the initial steering knuckle model and the bearing flange model after the load is applied in the embodiment of the present application. As shown in the figure, after the load is applied, a pressure change occurs at 407 on the inner wall of the steering knuckle hole compared with the pressure distribution in the reference state. The pressure change here is caused by the deformation of the initial steering knuckle model and the bearing flange model. The deformation amounts of the two can be referred to Table 1.

[0074] Table 1 Deformation of initial steering knuckle model and bearing flange model

[0075]

[0076] In Table 1, positions 1 and 2 on the initial knuckle model are positions on the inner wall of the knuckle hole on the initial knuckle model, and the line connecting position 1 and the center of the knuckle hole is perpendicular to the line connecting position 2 and the center of the knuckle hole; accordingly, positions 1 and 2 on the bearing flange model correspond to positions 1 and 2 on the initial knuckle model. It can be seen from Table 1 that under the condition of unilateral deep pit crossing, the sum of the deformation variables of the initial knuckle model and the bearing flange model exceeds the tolerance size gap, that is, contact friction occurs at 407, resulting in friction noise.

[0077] As an embodiment of the present application, when it is determined through the deformation amount that contact friction occurs, determining the second reason for the abnormal noise generated by the steering knuckle includes:

[0078] S422. If it is determined that contact friction occurs between the initial steering knuckle model and the bearing flange model, the second cause is determined to be that contact friction occurs between the initial steering knuckle model and the bearing flange model, resulting in abnormal friction noise, and the source of the abnormal noise is at the position where the initial steering knuckle model and the bearing flange model contact due to deformation.

[0079] Specifically, if the sum of the deformations of the initial steering knuckle model and the bearing flange model exceeds the tolerance size gap, the initial steering knuckle model and the bearing flange model will come into contact due to deformation, and friction will be generated between the two under the preset working conditions, resulting in friction noise. For example, Figure 7 As shown, Figure 7 Point 407 is the position where the initial steering knuckle model and the bearing flange model come into contact due to deformation. At this time, the contact surfaces of the two creep at point 407, causing friction and generating abnormal noise, and the source of the abnormal noise is located at point 407.

[0080] Reference Figure 8 , Figure 8 This is a step diagram for processing the abnormal sound caused by the second reason in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, the method also includes:

[0081] S430. Determine the dimensional deviation between the initial steering knuckle model and the bearing flange model according to the deformation amounts of the initial steering knuckle model and the bearing flange model.

[0082] S440. According to the size deviation, the design data of the bearing flange model is modified to obtain a new size bearing flange model.

[0083] Specifically, by modifying the initial steering knuckle model and the bearing flange model size, when the same deformation amount is generated, no contact friction phenomenon will occur between the two. Exemplarily, the size of the bearing flange model is updated, and the diameter of the outer flange in the obtained new size bearing flange model is 94mm, and the tolerance range is 93.92mm at the lower limit and 93.88mm at the upper limit. The slotted steering knuckle model and the new size bearing flange model are pre-tightened by the bolt model and assembled, and the preset working condition simulation is performed. At this time, the deformation amount of the slotted steering knuckle model and the new size bearing flange model can be referred to Table 2.

[0084] Table 2 Deformation of slotted steering knuckle model and new size bearing flange model

[0085]

[0086] It can be seen from Table 2 that under the condition of single-sided deep pit, the sum of the deformation variables of the slotted steering knuckle model and the new size bearing flange model is the same as before the update, and the tolerance size gap range at this time is 0.08mm to 0.17mm, and the sum of the deformation variables does not exceed the tolerance size gap. Therefore, there will be no contact friction between the slotted steering knuckle model and the new size bearing flange model, avoiding the generation of abnormal friction noise.

[0087] Reference Fig. 9 , Fig. 9 This is a step diagram for establishing a finite element model of a front suspension system in an embodiment of the present application. As shown in the figure, as an embodiment of the present application, establishing a finite element model of a front suspension system includes:

[0088] S110. Perform finite element modeling on the front suspension system according to the design data of the front suspension system to obtain a system model.

[0089] S120. Perform finite element modeling on the tire connected to the front suspension system to obtain a tire model.

[0090] S130. Setting connection constraints between the system model and the tire model to connect the system model and the tire model to obtain a finite element model.

[0091] Specifically, when establishing the finite element model of the front suspension system, all parts of the front suspension system are modeled and assembled; in addition, the tire connected to the front suspension system is modeled to obtain a tire model. During the simulation of the preset working condition, the load corresponding to the preset working condition is loaded on the tire model, and the front suspension system is affected by the load through transmission.

[0092] Reference Fig.10 , Fig.10 The schematic diagram of the finite element model provided in the embodiment of the present application is shown in the figure, and the system model is connected to the tire model by setting connection constraints on multiple hard points. For example, the connection relationship between the hard points of the left front suspension system and the constraint hard points can be referred to in Table 3.

[0093] Table 3 Connection relationship between left front suspension system hard points and constraint hard points

[0094]

[0095]

[0096] The hard points with copy in Table 3 are constraint hard points, corresponding to the hard points in the front suspension system. For example, when simulating extreme steering conditions, one-sided deep pit conditions, washboard road braking conditions, left turn steering wheel conditions and right turn steering wheel conditions, the load is applied to the hard point RP12. In addition, when simulating forward emergency braking conditions, the load is applied to the hard points RP12, RP13 and RP14. In the above conditions, the positioning point of the tire model is selected as RP1.

[0097] Accordingly, please refer to Fig.11 The embodiment of the present application provides a finite element analysis device for abnormal noise of a steering knuckle, the device comprising:

[0098] The model building module 100 is used to build a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together through a bolt model.

[0099] The first load simulation module 200 is used to apply a load corresponding to a preset working condition to the finite element model to determine the pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to characterize whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model.

[0100] The first abnormal noise analysis module 300 is used to determine the first cause of the abnormal noise generated by the steering knuckle when it is determined through the pressure change data that there is a contact surface separation phenomenon; wherein the first cause is used to guide the update of the contact surface of the initial steering knuckle model.

[0101] In some optional implementations, the first load simulation module 200 includes:

[0102] The surface pressure detection unit is used to detect the pressure change on the contact surface after the load is applied, taking the pressure on the contact surface after pre-tightening as a reference, and obtain the pressure change data.

[0103] The separation judgment unit is used to determine that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model if the pressure change data exceeds a set threshold.

[0104] In some optional implementations, the first abnormal sound analysis module 300 includes:

[0105] The first cause judgment unit is used to judge the cause of the abnormal noise and the location of the source of the abnormal noise. If it is determined that the contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model, it is determined that the first cause is the contact surface separation phenomenon causing the knocking noise, and the source of the abnormal noise is located on the contact surface of the initial steering knuckle model.

[0106] In some optional embodiments, the device further includes a first abnormal sound processing module, which includes:

[0107] The first size determination unit is used to obtain the pressure abnormality width of the specific position where the contact surface separation phenomenon occurs according to the pressure change data.

[0108] The first abnormal sound processing unit is used to set a noise reduction groove 406 on the contact surface of the initial steering knuckle model to obtain a slotted steering knuckle model; wherein the width of the noise reduction groove 406 is the same as the pressure abnormality width.

[0109] In some optional embodiments, the device further comprises:

[0110] The second load simulation module is used to apply the load corresponding to the preset working condition to the finite element model, and determine the deformation of the initial steering knuckle model and the bearing flange model respectively; wherein the deformation is used to characterize whether contact friction occurs between the initial steering knuckle model and the bearing flange model.

[0111] The second abnormal noise analysis module is used to determine the second reason for the abnormal noise generated by the steering knuckle when the contact friction phenomenon is determined by the deformation amount; wherein the second reason is used to guide the update of the dimensions of the initial steering knuckle model and the bearing flange model.

[0112] In some optional implementations, the second abnormal sound analysis module includes:

[0113] The second cause judgment unit is used to judge the cause of the abnormal noise and the location of the source of the abnormal noise. If it is determined that contact friction occurs between the initial steering knuckle model and the bearing flange model, the second cause is judged to be the contact friction between the initial steering knuckle model and the bearing flange model, resulting in the friction noise, and the source of the abnormal noise is at the position where the initial steering knuckle model and the bearing flange model contact due to deformation.

[0114] In some optional embodiments, the device further includes a second abnormal sound processing module, which includes:

[0115] The second size determination unit is used to determine the size deviation between the initial steering knuckle model and the bearing flange model according to the deformation amounts of the initial steering knuckle model and the bearing flange model.

[0116] The second abnormal sound processing unit is used to modify the design data of the bearing flange model according to the size deviation to obtain a bearing flange model with a new size.

[0117] In some optional implementations, the model building module 100 includes:

[0118] The system modeling unit is used to perform finite element modeling on the front suspension system according to the design data of the front suspension system to obtain a system model.

[0119] The tire modeling unit is used to perform finite element modeling on the tire connected to the front suspension system to obtain a tire model.

[0120] The model connection unit is used to set the connection constraints between the system model and the tire model so as to connect the system model and the tire model to obtain a finite element model.

[0121] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0122] The steering knuckle abnormal noise finite element analysis device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0123] See also Fig.12 , Fig.12It is a structural diagram of a computer device provided by an embodiment of the present application. As shown in the figure, the computer device includes: one or more processors 10, a memory 20, and an interface for connecting various components, including a high-speed interface and a low-speed interface. Each component uses different buses to communicate with each other, and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig.12 A processor 10 is taken as an example.

[0124] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0125] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0126] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0127] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0128] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0129] The embodiment of the present application also provides a computer-readable storage medium. The above method according to the embodiment of the present application can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0130] The embodiment of the present application provides a computer program product, which includes computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method of any embodiment of the present application.

[0131] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

[0132] It is understandable that before using the technical solutions disclosed in the embodiments of the present disclosure, the types, scope of use, usage scenarios, etc. of the personal information involved in the present disclosure should be informed to the user and the user's authorization should be obtained in an appropriate manner in accordance with relevant laws and regulations.

[0133] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly prompt the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can autonomously choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0134] As an optional but non-limiting implementation, in response to receiving an active request from the user, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0135] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet the relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0136] It is understandable that the data involved in this technical solution (including but not limited to the data itself, the acquisition or use of the data) shall comply with the requirements of relevant laws, regulations and relevant provisions.

[0137] It is understandable that in the specific implementation of the present application, related data such as user information, location information, navigation data, etc. are involved. When the above embodiments of the present application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0138] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0139] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0140] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0141] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0142] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0144] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0145] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0146] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

[0147] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A finite element analysis method for abnormal noise of a steering knuckle, characterized in that: The method comprises: Establishing a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model; Applying a load corresponding to a preset working condition to the finite element model, and determining pressure change data on a contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to characterize whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model; When it is determined through the pressure change data that the contact surface separation phenomenon occurs, a first cause of the abnormal noise generated by the steering knuckle is determined; wherein the first cause is used to guide the updating of the contact surface of the initial steering knuckle model.

2. The method according to claim 1, characterized in that Determine whether contact surface separation occurs between the initial steering knuckle model and the bearing flange model by: Taking the pressure on the contact surface after pre-tightening as a reference, detecting the pressure change on the contact surface after the load is applied, and obtaining the pressure change data; If the pressure change data exceeds a set threshold, it is determined that a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model.

3. The method according to claim 2, characterized in that When it is determined through the pressure change data that the contact surface separation phenomenon occurs, determining a first cause of the abnormal noise generated by the steering knuckle includes: If it is determined that the contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model, it is determined that the first cause is that the contact surface separation phenomenon causes abnormal knocking noise, and the source of the abnormal noise is located on the contact surface of the initial steering knuckle model.

4. The method according to claim 3, characterized in that: The method further comprises: According to the pressure change data, the pressure abnormality width at the specific location where the contact surface separation phenomenon occurs is obtained; A noise reduction groove is provided on the contact surface of the initial steering knuckle model to obtain a slotted steering knuckle model; wherein the width of the noise reduction groove is the same as the pressure anomaly width.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: Applying a load corresponding to a preset working condition to the finite element model, and determining the deformation amounts of the initial steering knuckle model and the bearing flange model respectively; wherein the deformation amount is used to characterize whether contact friction occurs between the initial steering knuckle model and the bearing flange model; When it is determined through the deformation amount that the contact friction phenomenon occurs, a second reason why the steering knuckle produces an abnormal noise is determined; wherein the second reason is used to guide the update of the dimensions of the initial steering knuckle model and the bearing flange model.

6. The method according to claim 5, characterized in that In the case where the contact friction phenomenon is determined to occur through the deformation amount, determining the second reason why the steering knuckle generates abnormal noise includes: If it is determined that contact friction occurs between the initial steering knuckle model and the bearing flange model, the second cause is determined to be that contact friction occurs between the initial steering knuckle model and the bearing flange model, resulting in abnormal friction noise, and the source of the abnormal noise is located at the position where the initial steering knuckle model and the bearing flange model contact due to deformation.

7. The method according to claim 6, characterized in that The method further comprises: Determining a dimensional deviation between the initial steering knuckle model and the bearing flange model according to the deformation amounts of the initial steering knuckle model and the bearing flange model; According to the size deviation, the design data of the bearing flange model is modified to obtain a bearing flange model with a new size.

8. The method according to claim 1, characterized in that The method of establishing a finite element model of the front suspension system includes: According to the design data of the front suspension system, finite element modeling is performed on the front suspension system to obtain a system model; Performing finite element modeling on a tire connected to the front suspension system to obtain a tire model; A connection constraint is set between the system model and the tire model to connect the system model and the tire model to obtain the finite element model.

9. A finite element analysis device for abnormal noise of a steering knuckle, characterized in that: The device comprises: A model building module, used to build a finite element model of the front suspension system; wherein the finite element model includes an initial steering knuckle model and a bearing flange model, and the initial steering knuckle model and the bearing flange model are pre-tightened together by a bolt model; A first load simulation module is used to apply a load corresponding to a preset working condition to the finite element model to determine pressure change data on the contact surface between the initial steering knuckle model and the bearing flange model; wherein the pressure change data is used to indicate whether a contact surface separation phenomenon occurs between the initial steering knuckle model and the bearing flange model; The first abnormal noise analysis module is used to determine the first cause of the abnormal noise generated by the steering knuckle when the contact surface separation phenomenon is determined to have occurred through the pressure change data; wherein the first cause is used to guide the updating of the contact surface of the initial steering knuckle model.

10. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 8 by executing the computer instructions.

Images